Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C253/00—Preparation of carboxylic acid nitriles
  • C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
  • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
  • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
  • C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
  • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
  • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
  • C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
  • C07C45/36—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in compounds containing six-membered aromatic rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
  • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
  • C07C45/37—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups
  • C07C45/38—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups being a primary hydroxyl group
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C67/00—Preparation of carboxylic acid esters
  • C07C67/28—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
  • C07C67/29—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by introduction of oxygen-containing functional groups
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/14—The ring being saturated

Definitions

• the present invention relates to a method for manufacturing a ketone by oxidizing an olefin, and more specifically relates to a method of manufacturing a corresponding ketone having a functional group such as hydroxyl group by oxidizing an olefin having the functional group.
• Carbonyl compounds including ketones such as methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), and acetone, and aldehydes typified by acetaldehyde are useful as solvents and chemical raw materials, and hence used in various fields.
• ketones having functional groups such as hydroxyl group are expected as solvents having strong cleaning performances, and ketoesters are useful also as pharmaceutical raw materials.
• Such carbonyl compounds are generally manufactured by two-step reaction methods in which an alcohol produced by hydrating an olefin is dehydrogenated. Meanwhile, as simpler methods, one-step reaction methods have also been known in which an olefin is directly oxidized.
• Known methods for directly oxidizing an olefin include the Wacker process in which an olefin is oxidized in the presence of a PdCl 2 /CuCl 2 catalyst, a method in which a terminal olefin is oxidized in the presence of a palladium catalyst and molecular oxygen in a polar solvent such as N,N-dimethylacetamide [ Angew. Chem. Int. Ed., 2006, 45, 481-485 (NPL 1)], and the like.
• This process also has a problem that if the number of carbon atoms of the olefin is increased, the reaction rate is markedly lowered. For this reason, in the industrial field, the use of the Wacker process is limited to only the manufacturing of lower carbonyl compounds such as acetaldehyde and acetone, which are obtained by oxidizing lower terminal olefins.
• Japanese Unexamined Patent Application Publication No. 2002-191979 discloses a method for manufacturing a ketone, in which an alkene is oxidized with molecular oxygen in the presence of an oxidation catalyst comprising a palladium compound, a heteropolyacid, and a strong acid.
• an oxidation catalyst comprising a palladium compound, a heteropolyacid, and a strong acid.
• PTL 2 discloses a method for manufacturing a ketone, in which an olefin, molecular oxygen, and water are reacted with each other in the presence of a catalyst comprising a palladium source, a mesoporous silicate, and an isopolyacid or an acidic salt thereof.
• a catalyst comprising a palladium source, a mesoporous silicate, and an isopolyacid or an acidic salt thereof.
• these PTLs disclose those having substituents such as hydroxyl group as the alkenes and the olefins.
• the conventional methods for manufacturing a ketone are still not fully satisfactory from the viewpoint that corresponding ketones are manufactured at high yields and high selectivities from internal olefins and cyclic olefins having functional groups such as hydroxyl group.
• the present invention has been made in view of the above-described problems of the conventional techniques, and an object of the present invention is to provide a method which makes it possible to oxidize an internal olefin or a cyclic olefin having a functional group such as hydroxyl group so that a corresponding ketone having the functional group can be manufactured at a high yield and a high selectivity.
• the present inventors have earnestly studied to achieve the above object. As a result, the present inventors have found that when an internal olefin or a cyclic olefin having a functional group containing a hetero atom and one carbon-carbon double bond or more at a position other than terminals of a molecule thereof is oxidized, the use of a specific amide-based solvent in the presence of a palladium catalyst, water, and molecular oxygen makes it possible to bond an oxo group to at least one of the carbon atoms constituting the carbon-carbon double bond, without oxidizing the functional group, so that a ketone which corresponds to the internal olefin or the cyclic olefin, and which has been difficult to manufacture at a high yield and a high selectivity by the conventional methods can be manufactured at a high yield and a high selectivity. This finding has led to the completion of the present invention.
• a method for manufacturing a ketone of the present invention comprises:
• the palladium catalyst is preferably a palladium halide, and a concentration of the palladium catalyst is preferably 0.001 to 1 mol/L.
• the amide-based solvent is preferably N,N-dimethylacetamide.
• the preferred internal olefin or the preferred cyclic olefin is a compound represented by the following formula (2): (in the formula (2), at least one of R 4 to R 7 is one selected from the group consisting of alkyl groups having the functional group, alkenyl groups having the functional group, and aryl groups having the functional group; the rest of R 4 to R 7 are each independently one selected from the group consisting of a hydrogen atom, alkyl groups, alkenyl groups, and aryl groups; at least one of R 4 and R 5 is a group other than a hydrogen atom; at least one of R 6 and R 7 is a group other than a hydrogen atom; when R 4 and R 6 are an alkyl group or an alkenyl group, R 4 and R 6 may be bonded to each other to form a ring structure; and when R 5 and R 7 are an alkyl group or an alkenyl group, R 5 and R 7 may be bonded to each other
• the internal olefin or the cyclic olefin more preferably has the functional group which is bonded to a first to third carbon atom away from the carbon-carbon double bond.
• the internal olefin or the cyclic olefin preferably has no carbon-carbon double bond at the terminals of the molecule thereof.
• the functional group is preferably at least one functional group selected from the group consisting of hydroxyl group, cyano group, alkoxy groups, acetoxyl groups, and oxo group.
• the internal olefin or the cyclic olefin is preferably oxidized in the absence of any copper catalyst.
• the manufacturing method of the present invention makes it possible to oxidize the internal olefin or the cyclic olefin having a functional group containing a hetero atom so that a corresponding ketone having the functional group can be manufactured at a high yield and a high selectivity.
• the present inventors presume as follows. Specifically, in the method for manufacturing a ketone of the present invention, molecular oxygen is not directly used for oxidation of the internal olefin or the cyclic olefin having a functional group, but is used as a reoxidizing agent.
• molecular oxygen as a reoxidizing agent enables the Wacker reaction of an internal olefin or a cyclic olefin, which has a lower reactivity than those of terminal olefins, to proceed efficiently, so that the yield of the corresponding ketone having the functional group is increased.
• a method for manufacturing a ketone of the present invention comprises:
• the olefin used in the present invention is an internal olefin or a cyclic olefin having a functional group containing a hetero atom and one carbon-carbon double bond or more at a position other than terminals of a molecule thereof (hereinafter referred to as a "functional group-containing internal olefin” and a “functional group-containing cyclic olefin,” respectively).
• the functional group include hydroxyl group, cyano group, alkoxy groups, phenoxy groups, acetoxyl groups, and oxo group.
• the functional groups hydroxyl group, cyano group, alkoxy groups, acetoxyl groups, and oxo group are preferable, from the viewpoint that the oxo group is likely to be bonded to the carbon atom more distant from the functional group, of the two carbon atoms constituting the carbon-carbon double bond.
• one kind of functional group alone may be present in one molecule, or two or more kinds of functional groups may be present in one molecule.
• the functional groups may be bonded to the same carbon atom, or different carbon atoms.
• the oxo group tends to be bonded more selectively to the carbon atom more distant from the functional group, of the two carbon atoms constituting the carbon-carbon double bond.
• the oxo group tends to be bonded to the carbon atom more distant from the functional group, of the two carbon atoms constituting the carbon-carbon double bond, at a selectivity of 80% or higher.
• the oxo group tends to be bonded to the carbon atom more distant from the functional group, of the two carbon atoms constituting the carbon-carbon double bond, at a selectivity of 90% or higher.
• the oxo group tends to be bonded to the carbon atom more distant from the functional group, of the two carbon atoms constituting the carbon-carbon double bond, at a selectivity of 95% or higher.
• the alkyl group in the alkoxy group may be linear, branched, or cyclic, and may have a substituent such as phenyl group, methylphenyl group, or benzyl group.
• the number of carbon atoms of the alkyl group is preferably 1 to 12, and more preferably 1 to 6.
• the phenyl group in the phenoxy group may have a substituent such as an alkyl group, phenyl group, methylphenyl group, or benzyl group.
• any olefin having a carbon-carbon double bond at its terminal, or any olefin having no such a bond can be used as the functional group-containing internal olefin or the functional group-containing cyclic olefin according to the present invention, as long as the olefin has the functional group and one carbon-carbon double bond or more at an internal position in a molecule thereof.
• the functional group-containing internal olefin or the functional group-containing cyclic olefin is preferably a compound represented by the following formula (2): (in the formula (2), at least one of R 4 to R 7 is one selected from the group consisting of alkyl groups having the functional group, alkenyl groups having the functional group, and aryl groups having the functional group; the rest of R 4 to R 7 are each independently one selected from the group consisting of a hydrogen atom, alkyl groups having no functional group, alkenyl groups having no functional group, and aryl groups having no functional group; at least one of R 4 and R 5 is a group other than a hydrogen atom (i.e., any one of the alkyl groups, the alkenyl groups, and the aryl groups having no functional group, and the alkyl groups, the alkenyl groups, and the aryl groups having the functional group); at least one of R 6 and R 7 is a group other than a hydrogen atom (i.e., any one of the al
• the alkyl groups having the functional group and the alkenyl groups having the functional group may be linear, branched, or cyclic.
• the number of carbon atoms of the alkyl chain (a moiety excluding the functional group) in such an alkyl group having the functional group is preferably 1 to 12.
• the number of carbon atoms of the alkyl chain is more preferably 7 to 12; however, there arises no problem even when the number of carbon atoms of the alkyl chain in the alkyl group having the functional group is 1 to 6.
• the aryl groups having the functional group include groups obtained by substituting the functional group in phenyl group, methylphenyl group, or benzyl group.
• the alkyl groups having no functional group and the alkenyl groups having no functional group may be linear, branched, or cyclic.
• the number of carbon atoms of such an alkyl group is preferably 1 to 12. From the viewpoint that a corresponding ketone having a functional group can be manufactured easily by the present invention even when an internal olefin or a cyclic olefin having a long-chain alkyl group is used, the number of carbon atoms of such an alkyl group is more preferably 7 to 12; however, there arises no problem even when the number of carbon atoms of the alkyl group having no functional group is 1 to 6.
• the aryl groups having no functional group include phenyl group, methylphenyl group, and benzyl group.
• R 4 and R 6 , and/or, R 5 and R 7 may be bonded to each other to form a ring structure.
• a ring structure include cyclic olefins such as cycloalkenes and cycloalkadienes.
• the functional group-containing internal olefin include hydroxyl group-containing internal olefins such as 2-buten-1-ol [1-hydroxy-2-butene], 2-methyl-2-buten-1-ol [1-hydroxy-2-methyl-2-butene], 3-methyl-2-buten-1-ol [1-hydroxy-3-methyl-2-butene], 2-hexen-1-ol [1-hydroxy-2-hexene], 4-hexen-1-ol [1-hydroxy-4-hexene], 5-methyl-2-hexen-1-ol [1-hydroxy-5-methyl-2-hexene], 2-methyl-4-hexen-1-ol [1-hydroxy-2-methyl-4-hexene], 2-octen-1-ol [1-hydroxy-2-octene], 6-octen-1-o1 [1-hydroxy-6-octene], 3-nonen-1-ol [1-hydroxy-3-nonene], 6-nonen-1-ol [1-hydroxy-6-nonen
• Isomers such as cis- and trans-isomers, of these functional group-containing internal olefins can be each used equally. Moreover, these functional group-containing internal olefins may be used singly or in combination of two or more kinds.
• examples of the functional group-containing cyclic olefin include those in which the functional group such as hydroxyl group or an oxo group is bonded to a cycloalkene such as cyclopentene, cyclohexene, cyclooctene, or cyclodecene, or a cycloalkadiene typified by cyclooctadiene, and more specifically include oxo group-containing cyclic olefins such as 2-cyclohexen-1-one, hydroxyl group-containing cyclic olefins such as 2-cyclohexen-1-ol, and acetoxyl group-containing cyclic olefins such as 2-cyclohexene-1-acetate.
• These functional group-containing cyclic olefins may be used singly or in combination of two or more kinds.
• hydroxyl group-containing linear internal olefins such as 2-buten-1-ol [1-hydroxy-2-butene], 2-hexen-1-ol [1-hydroxy-2-hexene], 4-hexen-1-ol [1-hydroxy-4-hexene], 2-octen-1-ol [1-hydroxy-2-octene], 6-octen-1-ol [1-hydroxy-6-octene], 3-nonen-1-ol [1-hydroxy-3-nonene], and 6-nonen-1-ol [1-hydroxy-6-nonene]; cyano group-containing linear internal olefins such as 3-pentenenitrile [1-cyano-2-butene], 3-heptenenitrile [1-cyano-2-hexene], 5-heptenenitrile [1-cyano-4-hexene], 3-nonen
• a concentration of the functional group-containing internal olefin or the functional group-containing cyclic olefin is preferably 0.01 to 5 mol/L, and more preferably 0.05 to 1 mol/L. If the concentration of the functional group-containing internal olefin or the functional group-containing cyclic olefin is lower than the lower limit, the functional group-containing ketone tends not to be obtained at a high yield. Meanwhile, if the concentration exceeds the upper limit, the functional group-containing ketone tends not to be manufactured at a high yield because the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin does not proceed sufficiently.
• the palladium catalyst used in the present invention is not particularly limited, as long as the palladium catalyst is a compound containing a palladium atom. Those which have been used in manufacturing of ketones can be each used as a palladium catalyst used in the present invention.
• Such a palladium catalyst include palladium halides such as palladium chloride and palladium bromide, palladates such as sodium tetrachloropalladate, sodium tetrabromopalladate, potassium tetrachloropalladate, and potassium tetrabromopalladate, ammine complexes of palladium halides such as tetraamminepalladium dichloride and diamminepalladium tetrachloride, organic acid salts of palladium such as palladium acetate and palladium(II) trifluoroacetate, nitrile complexes of palladium halides such as diacetonitrile palladium dichloride and dibenzonitrile palladium dichloride, organic palladium compounds and complexes such as tris(dibenzylideneacetone) dipalladium-chloroform adduct and cyclooctadiene palladium dichloride, and
• palladium catalysts preferred are palladium halides, and nitrile complexes of palladium halides, and more preferred are palladium halides, from the viewpoint that the yield and the selectivity can be improved in the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin.
• the palladium catalyst may be in a form of being dissolved in the amide-based solvent to be described later, or in a form of being uniformly or non-uniformly dispersed therein, or in a form of a combination thereof.
• some of the components of the palladium catalyst for example, the ligand
• the rest of the components may be uniformly or non-uniformly dispersed therein.
• a concentration of the palladium catalyst is preferably 0.001 to 1 mol/L, more preferably 0.002 to 0.5 mol/L, and particularly preferably 0.005 to 0.05 mol/L. If the concentration of the palladium catalyst is lower than the lower limit, the functional group-containing ketone tends not to be manufactured at a high yield, because the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin does not proceed sufficiently.
• the concentration of the palladium catalyst exceeds the upper limit, the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin tends not to proceed sufficiently because of the formation of an inactive species, Pd black.
• the amide-based solvent represented by the formula (1) is used as a solvent.
• the use of such an amide-based solvent makes it possible to efficiently reoxidize the palladium catalyst with molecular oxygen.
• R 1 represents an alkyl group having 1 to 4 carbon atoms
• R 2 and R 3 each independently represent an alkyl group having 1 to 4 carbon atoms or an aryl group.
• R 1 and R 2 may be bonded to each other to form a ring structure. Examples of such a ring structure include the pyrrolidone skeleton, the caprolactam skeleton, and the like.
• amide-based solvent used in the present invention include N,N-dimethylacetamide, N,N-diethylacetamide, N,N-dipropylacetamide, N-methyl-N-ethylacetamide, N-butyl-N-phenylacetamide, N,N-dimethylpropanamide, N,N-diethylpropanamide, N-methyl-N-ethylpropanamide, N-methyl-2-pyrrolidone, N-methyl-2-caprolactam, N-ethyl-2-caprolactam, and the like. These solvents may be used singly or in combination of two or more kinds. In addition, in the present invention, the amide-based solvent may be used in combination with other solvents.
• amide-based solvents preferred are N,N-dimethylacetamide and N-methyl-2-pyrrolidone, and more preferred are N,N-dimethylacetamide, from the viewpoint that the yield and the selectivity are improved in the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin.
• the amount of the amide-based solvent used is set as appropriate so that the concentrations of the functional group-containing internal olefin or the functional group-containing cyclic olefin and the palladium catalyst can be within the above-described ranges.
• the functional group-containing ketone is manufactured by allowing the functional group-containing internal olefin or the functional group-containing cyclic olefin to react with water.
• the amount of water added is not particularly limited, as long as the amount is necessary for the reaction.
• the amount of water may be set as appropriate according to the kinds of the functional group-containing internal olefin or the functional group-containing cyclic olefin, the palladium catalyst, and the amide-based solvent to be used, as well as the reaction mode, and conditions thereof.
• the amount of water is preferably 0.5 to 70 parts by volume, and more preferably 1 to 50 parts by volume, relative to 100 parts by volume of the amide-based solvent.
• the yield of the functional group-containing ketone tends to decrease because a sufficient oxidation reaction rate cannot be achieved.
• the amount of water exceeds the upper limit, the activity of the catalyst tends to be lowered because the palladium component deposits or aggregates as palladium metal.
• the yield of the functional group-containing ketone tends to be decreased, because the low solubility of the functional group-containing internal olefin or the functional group-containing cyclic olefin in water leads to a decreased contact efficiency of the functional group-containing internal olefin or the functional group-containing cyclic olefin with the palladium catalyst, so that a sufficient oxidation reaction rate cannot be achieved.
• the palladium catalyst having been used to oxidize the functional group-containing internal olefin or the functional group-containing cyclic olefin is reoxidized by using molecular oxygen.
• substantially no co-catalyst such as a copper catalyst is used, the oxidation reaction of the functional group-containing internal olefin or the functional group-containing cyclic olefin is not inhibited by the copper catalyst, so that the functional group-containing ketone can be manufactured from the functional group-containing internal olefin or the functional group-containing cyclic olefin at a high yield and a high selectivity.
• Examples of the source of the above-described molecular oxygen include oxygen gas, oxygen-enriched air, air, mixture gases of oxygen gas with a diluent gas (these are collectively referred to as "oxygen-containing gases").
• examples of the diluent gas include nitrogen gas, helium gas, argon gas, carbon dioxide, and the like. Nitrogen gas is generally used as the diluent gas.
• gases other than these oxygen-containing gases and than the diluent gases can be each used in combination, unless the effect of the present invention is impaired.
• an oxygen-containing gas may be supplied as a mixture with water, the amide-based solvent, or the like, as needed.
• the oxygen-containing gas is preferably supplied at an oxygen pressure of 0.1 to 1 MPa (more preferably 0.3 to 1 MPa). If the oxygen pressure is lower than the lower limit, the functional group-containing ketone tends not to be manufactured at a high yield because of the formation of an inactive species, Pd black. Meanwhile, if the oxygen pressure exceeds the upper limit, in some cases an oxidized by-product is formed in some functional group-containing internal olefins and some functional group-containing cyclic olefins.
• a functional group-containing ketone is referred to as a "corresponding ketone having a functional group” or the like.
• the mode of the oxidation reaction is not particularly limited, as long as the palladium catalyst and the functional group-containing internal olefin or the functional group-containing cyclic olefin can be brought into contact with each other.
• the oxidation reaction can be conducted in any form of gas-liquid reaction and/or liquid-liquid reaction according to the functional group-containing internal olefin or the functional group-containing cyclic olefin, and the palladium catalyst to be used.
• a batch, semi-batch, semi-continuous, or continuous-flow reaction system, or a combination thereof can be employed.
• the method for supplying components such as the functional group-containing internal olefin or the functional group-containing cyclic olefin is not particularly limited, and the components may be supplied in a form of liquid or a form of gas.
• the manufacturing method include a batch method in which the oxygen-containing gas and a catalyst solution prepared by mixing the palladium catalyst with the amide-based solvent or a mixture solution obtained by mixing the functional group-containing internal olefin or the functional group-containing cyclic olefin with the catalyst solution are placed in a batch reactor, and allowed to react with each other; a semi-batch method or a semi-continuous method in which the functional group-containing internal olefin or the functional group-containing cyclic olefin and the oxygen-containing gas are continuously fed into the catalyst solution, or the oxygen-containing gas is continuously fed into the mixture solution; a continuous-flow method in which the catalyst solution, the functional group-containing internal olefin or the functional group-containing cyclic olefin, and the oxygen-containing gas are caused to flow simultaneously through a reaction region; and the like.
• the feed rate of the functional group-containing internal olefin or the functional group-containing cyclic olefin is preferably 10 to 5000 mol/h per mole of palladium. If the feed rate of the functional group-containing internal olefin or the functional group-containing cyclic olefin is lower than the lower limit, the amount of the functional group-containing ketone produced per unit time tends to decrease.
• the feed rate of the oxygen-containing gas is adjusted as appropriate so that the oxygen pressure inside the reaction system is within the above-described range.
• the reaction temperature for carrying out the oxidation reaction is preferably 0 to 200°C, and more preferably 20 to 100°C. If the reaction temperature is lower than the lower limit, the yield of the functional group-containing ketone tends to be decreased because of a slow reaction rate. Meanwhile, if the reaction temperature exceeds the upper limit, the selectivity to the functional group-containing ketone tends to be decreased because a side-reaction, such as isomerization, of the functional group-containing internal olefin occurs.
• a concentration of a copper catalyst which is used in the conventional Wacker process, is preferably 0.03 mol/L or less, more preferably 0.01 mol/L or less, and particularly preferably 0.003 mol/L or less. If the concentration of the copper catalyst exceeds the upper limit, the yield of the functional group-containing ketone tends to be decreased. From such a viewpoint, in the present invention, it is most preferable to oxidize the functional group-containing internal olefin or the functional group-containing cyclic olefin in the absence of any copper catalyst. In the conventional Wacker process, the copper catalyst accelerates the reoxidation of the palladium catalyst.
• the yield of the functional group-containing ketone tends to be decreased if a copper catalyst is coexistent. Accordingly, it is presumed that the copper catalyst inhibits an activity of the palladium catalyst in the reaction which would proceed efficiently with molecular oxygen unless the copper catalyst is coexistent.
• the functional group-containing ketone thus obtained can be obtained as any one of a single compound and a mixture, which have a desired purity or composition, by separating and purifying the ketone in a usual manner.
• the unreacted raw material can be recovered and reused for manufacturing the ketone.
• the amide-based solvent and the palladium catalyst can also be separated and recovered, and then used repeatedly. At this time, the palladium catalyst can be appropriately regenerated, if necessary.
• Palladium chloride manufactured by N. E. Chemcat Corporation, 17.6 mg, 0.1 mmol
• DMA N,N-dimethylacetamide
• water 0.5 ml
• the obtained solution was transferred to a stainless steel autoclave reactor equipped with an inner tube made of Teflon (registered trademark). Then, the pressure inside the reactor was raised to 0.9 MPa by supplying oxygen gas thereto, and stirring was conducted at room temperature for 1 hour.
• Table 1 shows the conversion of 6-nonen-1-ol and the selectivities to 1-hydroxy-6-nonanone and 1-hydroxy-7-nonanone among all the products.
• Example 2 a crude reaction product was collected from the solution after completion of the reaction, and purified, in the same manner as in Example 1.
• the purified reaction product was identified as 1-benzyloxy-3-hexanone by 1 H-NMR analysis, 13 C-NMR analysis and HRMS analysis.
• the 1 H-NMR and 13 C-NMR chemical shifts and the result of the HRMS analysis of 1-benzyloxy-3-hexanone are shown below.
• Example 2 a crude reaction product was collected from the solution after completion of the reaction, and purified, in the same manner as in Example 1.
• the purified reaction product was identified as 1-methoxy-3-octanone by 1 H-NMR analysis and 13 C-NMR analysis.
• the 1 H-NMR and 13 C-NMR chemical shifts of 1-methoxy-3-octanone are shown below.
• An oxidation reaction was conducted in the same manner as in Example 5, except that the amount of palladium chloride supplied was changed to 31.9 mg (0.18 mmol), the amount of N,N-dimethylacetamide (DMA) supplied was changed to 15 ml, the amount of water supplied was changed to 1.5 ml, and the amount of 2-butenyl-1-acetate supplied was changed to 128.8 mg (1.13 mmol), and that the pressure inside the reactor was raised to 0.6 MPa.
• DMA N,N-dimethylacetamide
• the present invention makes it possible to manufacture a corresponding ketone having a functional group such as hydroxyl group at a high yield and a high selectivity from an internal olefin or a cyclic olefin having the functional group.
• the method for manufacturing a ketone of the present invention is economically advantageous because of the high yield of the corresponding ketone having the functional group and the high selectivity thereto, and the ketones having the functional group obtained by the above-described method are useful as industrial raw materials such as solvents and chemical raw materials.
• 1-acetoxy-3-butanone, 1-hydroxy-3-butanone, and the like are precursors of 1,3-butanediol used as a raw material of polyesters and as a moisturizing agent.
• 1,3-cyclohexane dione and the like have high potential in industry, because 1,3-cyclohexane dione and the like are an intermediate of herbicides (sulcotrione and mesotrione) or agricultural chemicals, and is used in various organic syntheses.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43856908

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (5)

• 2010
  • 2010-10-08 WO PCT/JP2010/067734 patent/WO2011043459A1/ja active Application Filing
  • 2010-10-08 EP EP10822129A patent/EP2487149A1/de not_active Withdrawn
  • 2010-10-08 JP JP2011535477A patent/JPWO2011043459A1/ja active Pending
  • 2010-10-08 CN CN2010800443705A patent/CN102548942A/zh active Pending
  • 2010-10-08 US US13/500,677 patent/US20120197036A1/en not_active Abandoned

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events